Anodizing in surface industry
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- Anodizing flowsheet
a) Example of decorative anodizing options
Literature: BAT for the Surface Treatment of Metals and Plastics, May 2005
b) Typical anodozing plant layout
Literature: BAT for the Surface Treatment of Metals and Plastics, May 2005
- Typical parameters of the process
Process | Temperature [°C] | Heat transfer medium | Residence time | Chemicals | Concentration | Details | Literature |
Chromic acid anodizing of aluminium(decorative) | 20 | 10-15 min | Sulphutic acids | 180-200 g/l | BAT for the surface treatment of metals and plastics, August 2006 | ||
Special electrolytes | Sulphuric acid: 150 g/l; oxalic acid: 30 g/l | ||||||
Hard anodizing | <5 | Sulphuric acid | |||||
Sulphuric acid, oxalic acid | |||||||
Chromic acid anodizing of aluminium | 38-42 | Chromic acid | 30-100 g/l |
- Energy losses from the surface area of heated process solutions
LITERATURE: BAT for the Surface Treatment of Metals and Plastics, May 2005